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Discovering Psychology: Updated Edition

Investigation: Methodology

After defining your sample and describing your variables of interest, you can then decide on the best research method and design, and what, if any, control procedures you may need in order to safeguard from alternative explanations. Alternative explanations result when factors other than those you are researching cause the observed effects.

Click on the links to learn more, then test your knowledge:

When you complete the quiz below, explore Data Collection next.


Question 1: If your study is designed to test the cause-and-effect relationship between two variables, you are using ___.

Question 2: If, in your study, you measure participants against themselves, you are using ___.

Question 3: Using a double-blind-control allows you to ___.

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